What are the general hardware and special hardware for doors and windows in construction works? How to distinguish what is ordinary hardware which is a special hardware?
Special hardware: valuable hardware and the owners that should be a separate list of hardware accessories
The rest can be identified as ordinary hardware
Door and window works does not exist special hardware, since it is engineering, it shows that the amount of quantity can be ordered to the hardware manufacturers! Bulk purchase of hardware is not special!
Have to say special, single order to be considered!
For aluminum doors and windows, the hardware slot to meet the European standard C tank specifications should be considered ordinary hardware!
For steel doors and windows, the hardware slot regulations European standard U slot specifications of the ordinary hardware!
